10results about How to "Reduce uneven deformation" patented technology

The invention relates to a device for realizing accurate patterning transfer of a microstructure through air pressure type vibration-assisted ultraviolet nano-imprinting, and belongs to the field of ultra-precision machining. The device comprises an outer closed compartment, a lifting platform, an xyz-axis displacement micro-motion platform, a vibration platform, an imprinting device, an ultraviolet light curing device, a substrate, a supporting frame, an air pressure device and a tray. An impressing film is fixed through a machine cover, an impressing device is installed in an outer closed compartment through a partition plate, a lifting platform and an xyz-axis displacement micro-motion platform are matched to control a substrate on a tray to be attached to the impressing device, an air pressure device can increase air pressure to provide impressing force to achieve impressing, and a vibration platform assists in impressing glue filling and demolding. And the ultraviolet light curing device is used for carrying out ultraviolet light irradiation curing, demolding is carried out after curing is completed, and microstructure transfer of the upper template of the imprinting film is completed. According to the device, patterning transfer of a large-area microstructure is achieved through gas imprinting, imprinting force is controlled through air pressure, imprinting efficiency, the filling rate and fidelity are improved, and damage to the imprinting device and a template is reduced.

The utility model provides a traffic tunnel post-earthquake inverted arch repairing structure which comprises a steel frame cover arch and a shock insulation assembly, the steel frame cover arch is arranged below a tunnel lining section, the shock insulation assembly is arranged on the inner surface of a repaired inverted arch primary support, and a plurality of feet-lock anchor pipes are arranged on each side of a wall foot of the steel frame cover arch. The shock insulation assembly comprises polyurethane foam plates and rubber shock insulation supports, the polyurethane foam plates are evenly arranged on the inner surface of the repaired inverted arch primary support after being spliced and fixed through long steel nails with gaskets, and the rubber shock insulation supports are embedded in the middles of the polyurethane foam plates in a dot matrix mode. Reinforcing is conducted through the steel frame cover arch, and the stability of the lining upper structure is improved; the shock insulation support is arranged on the inner surface of the primary support, uneven deformation, caused by shock, of a surrounding rock-structure is effectively reduced, the lining structure can better adapt to deformation of the surrounding rock, the shock resistance of a traffic tunnel under the action of strong shock is improved, and safe operation of a lifeline of the traffic tunnel is guaranteed.

The invention provides a test device and a test method for realizing uniform tensile loading of a stiffened wallboard, the test device comprises a first clamp, a second clamp and a third clamp, the first clamp is located below a wallboard skin, the second clamp is located above the wallboard skin, the first clamp and the second clamp are in contact with the lower surface and the upper surface of the wallboard skin, and the third clamp is in contact with the lower surface and the upper surface of the wallboard skin. The wall plate skin is jointly clamped; the first clamp and the second clamp are simultaneously and directly connected with a testing machine; the second clamp is connected with the third clamp, and the third clamp is connected with the second clamp and the stiffened strip so that the load can be transmitted to the stiffened strip. The test method comprises the following steps: the support is provided with the stiffened wall plate; assembling the test device and the stiffened wall plate; the clamps and the stiffened wall plates are installed on a testing machine; and applying a load by the testing machine, and measuring the ultimate strength of the stiffened wallboard. According to the invention, the stiffened strip and the wallboard skin are directly connected with the testing machine through the clamp, so that the wallboard skin and the stiffened strip are uniformly loaded, overall uniform stretching is realized, and the stiffened wallboard is prevented from being broken at the root of the clamp firstly.

The application discloses a high-strength hot-rolled rail low-residual stress straightening method and belongs to the technical field of rail production processes. The method realizes effective reduction of the bending degree of the rail before straightening and precise control of uneven deformation in the straightening process by implementing the precise reverse pre-bending process on the rail cooling stage, cooperating with the optimized straightening machine horizontal roll reduction parameters and the straightening speed control, finally controls the rail bottom residual stress of the 60kg / m (60, 60N) high-strength hot-rolled rail below 250MPa, and reduces 37-46MPa compared with the traditional process, significantly improves the rail straightness and use safety, and enhances the product market competitiveness.

The present invention provides a gear steel for a wind turbine. The gear steel comprises a gear steel body and groove steps symmetrically arranged at both ends, and the bottom and upper edges of the groove steps have transition fillets with a radius of 1 / 8 of the width of the groove steps. This design significantly reduces stress concentration at sharp corners, reduces the risk of cracks and fractures, and improves the fatigue strength and durability of the gear steel. The forging process includes preheating, preliminary forging, remelting and heat preservation, mold forming, cooling, post-processing and surface treatment. By multiple step-by-step forging and controlling the deformation amount each time, local stress can be effectively dispersed and released, and the material fluidity and mechanical properties can be optimized, thereby significantly improving the overall quality, stability and service life of the gear steel.

The present disclosure relates to a mask, a mask device and a mask design optimization method. The mask includes: a pattern area and a second rib located at the edge of the pattern area, the pattern area includes: a plurality of openings, adjacent openings are separated by a first rib; wherein at least one of the plurality of openings has a non-straight first side, two second sides intersecting the first side, and a third side located on the opposite side of the first side and intersecting the second side, an opening for compensating the tensile deformation of the first side is provided on the second rib, an extension line of the two second sides extending toward the second rib along a first direction intersects with the second rib to obtain a first area, the opening is at least located in the first area, the first direction is parallel to the second side, and a second direction perpendicular to the first direction is parallel to the third side.

The invention relates to the technical field of aviation aircraft parts, in particular to a titanium alloy shell part forming method which comprises the following steps: S1, primary heating and heat preservation; s2, primary upsetting is carried out; s3, lubrication is conducted; s4, secondary heating and heat preservation; s5, secondary upsetting is conducted, specifically, backward extrusion and punching are conducted before secondary upsetting; according to the method, the backward extrusion technology is carried out before secondary upsetting, the size of the obtained forge piece is smaller than the diameter of an existing backward extrusion forge piece, the height of the obtained forge piece is larger than that of the existing backward extrusion forge piece, the shape and size precision of the forge piece is improved, metal materials are saved, and the mechanical performance of the parts is improved due to the fact that metal fiber streamlines are profiling. The device has the characteristics of high efficiency, high quality and low energy consumption, and has very high use value in technology and economy.

The invention provides a titanium alloy bar production line, and belongs to the technical field of metal processing, the titanium alloy bar production line comprises a cogging mill, a plurality of groups of three-roller reducing and sizing units, a plurality of roller ways, a plurality of shearing devices, a plurality of pinch rollers, a plurality of hot metal detectors, a heat compensation device and a material receiving device; according to the titanium alloy bar production line, three groups of three-roller reducing and sizing units are continuously configured after the cogging mill is directly adopted, so that the length of the production line is greatly shortened, the occupied area is reduced, and the land cost of construction and operation is reduced; and the three groups of three-roller reducing and sizing units are accurately calculated and the distances are reasonably set, so that the stability of the bars in the rolling process is ensured, the problems of temperature loss and surface quality caused by long-distance transmission are reduced, a loop does not need to be arranged, and the pass tension control is easier to carry out. The design of the three-roller reducing and sizing unit can effectively control the shape and size precision of the rod, reduce the uneven deformation of the intermediate blank, and further improve the quality of the finished product.

The invention relates to a forging method of an ultra-long two-phase titanium alloy forged plate. The forging method comprises the steps of high-temperature cogging forging, recrystallization forging, homogenizing forging and pre-forming forging and forming forging. According to the method, a reversing drawing-out process is introduced in the high-temperature cogging and low-temperature preforming processes, so that uniform deformation of the interior of a material is effectively promoted, the mechanical properties of a forged plate in the length direction, the width direction and the thickness direction reach high consistency, and meanwhile, the mechanical properties of the forged plate in the length direction, the width direction and the thickness direction are greatly improved. And the temperature, deformation, pressing speed and other parameters in the forging process are precisely controlled, forging defects are reduced, the yield is further improved, the production efficiency is improved through the whole process, the production cost is reduced, the batch stability of forged plates can be guaranteed, and the requirements of the aerospace field and other fields for high-performance titanium alloy forgings are met.

This invention discloses a double-walled small bend tube and a recirculation combustion chamber, comprising an inner wall and an outer wall spaced apart. One end of the inner wall near the flame tube is connected to the other end of the outer wall near the flame tube. The inner and outer walls form a cavity for forming a cooling gas film. The outer wall has n rows of impact cooling holes for introducing cooling gas into the cavity. Each row of impact cooling holes is evenly distributed along the circumferential direction of the outer wall and has the same diameter. The diameter of the n rows of impact cooling holes increases gradually from the end of the outer wall near the flame tube to the end away from the flame tube, so that the flow rate of cooling gas impacting the inner wall increases gradually with the distance from the flame tube. This can effectively reduce the highest wall surface temperature at the end of the inner wall, reduce the ablation and uneven deformation of the double-walled small bend tube, extend its service life, and effectively solve the air leakage problem between the small bend tube and the casing under different vibrations and thermal expansion deformation, ensuring a seal.